“Mathematical Model of Fuzzy Control by the Inpayment Process to the University from Home Students That Study by Contract”. Visnyk of Vinnytsia Politechnical Institute, no. 1 (March 6, 2013): 31–36. Accessed October 10, 2026. https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/1120.